Local atomic arrangement in the solid solutions of iron in $\alpha$- and $\beta$- modifications of manganese

The local distribution of atoms in solid solutions of iron in α and β modifications of manganese is studied by the methods of X - ray structural analysis of polycrystals and nuclear γ resonance. Concentrational dependences of the distribution of iron and manganese atoms for α and β solid solutions are obtained, and the ordered distribution of iron atoms in the structures of α and β Mn is experimentally observed. It is established that, at the boundaries of single - phase α and β solid solutions, the distribution of iron atoms in α and β Mn structures corresponds to the mean statistical distribution, and on this basis it is concluded that the configurational energy plays the decisive role in the stabilization of α and β phases in Mn - Fe alloys.